Pump for fluid supply and method for supplying fluid

ABSTRACT

The present invention includes a fixed member provided the drive motor, drive gear and transmission gear which move an output shaft of the drive motor in concert and a clutch mechanism having a clutch which engages with said gears, a driven gear which is provided at an end portion of the inner sleeve body, engaging with an operating rod of the extrusion operating part freely and engaging with the drive gear and a screwed body, which is formed in the shape of a sleeve, positioning between support plates of the fixed member, screwing a screwed part of the operating rod and engaging with the transmission gear. Therefore, it can reduce the manufacturing cost.

FIELD OF THE INVENTION

The present invention relates to a pump for supplying fluid and a method for supplying fluid, capable for expelling fluid at fixed quantity.

BACKGROUND OF THE INVENTION

The pump for fluid supply which expels the soup with fixings supplied into the inner sleeve body which has an inner valve function at fixed quantity and through the outer sleeve body from a supply source is disclosed in the reference documents 1 to 5.

Accordingly, the reference documents disclose (a) the extrusion operating part is retreated in a predetermined position by driving force of the first drive motor, and the soup with fixings is put into the fixed quantity-capacity chamber of the inner sleeve body through the suction hole of the outer sleeve body and (b) by driving force of the second drive motor which separates from the first drive motor The matter which carries out rotation so that inner sleeve body is made to rotate at a predetermined quantity so as to connect to the discharge hole of the outer sleeve body.

However, although the invention described in the above-mentioned reference documents has the advantage that the soup with fixings can be subdivided and pour into glasses, it is generally very expensive because the first drive motor for the extrusion operating part and second motor for the inner sleeve body are separated. In addition, this inventor proposes the above-mentioned reference documents.

Reference document 1: Unexamined patent application publication 2000-226100;

Reference document 2: Unexamined patent application publication 2002-112742;

Reference document 3: U.S. Pat. No. 6,006,657;

Reference document 4: U.S. Pat. No. 6,152,020; and

Reference document 5: U.S. Pat. No. 6,513,421.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a pump for fluid supply which can be cheap to manufacture. It is another object of the present invention to provide a pump for fluid supply that can connect reasonably and adequately a clutch of the clutch mechanism with drive gear which is provided to the output shaft of the drive motor and the transmission gear of the extrusion operating part of the inner sleeve body. It is still another object of the present invention to provide a pump for fluid supply which can reciprocate the extrusion operating part smoothly. It is further object of the present invention to provide a pump for fluid supply that can remove the inner sleeve body (or the outer sleeve body and inner sleeve body) from the fixed member at least. Therefore, it is easy to wash the inner sleeve body. It is further object of the present invention to provide a pump for fluid supply that support the output shaft of the drive motor. It is further object of the present invention to provide a pump for fluid supply that can be used for the soup with fixings suitably.

The present invention is understood to encompass embodiments that include all or only a portion of the above objects, features and advantages which, unless recited in claims defining the invention, are understood not to limit interpretation of such claims. The above, and other objects, features and advantages of the present invention will become apparent from the following description read in conjunction with the accompanying drawings, in which like reference numerals designate the same elements.

It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only, and are not intended as a definition of the limits of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1 to 10 shows a schematic explanation view in section showing an embodiment of the present invention;

FIG. 1 is a schematic explanation view in section (an inner sleeve body and extrusion operating part are positioned at an original point, for example);

FIG. 2 is an explanation view of main parts (drive source and clutch mechanism) (when a clutch connects a drive gear);

FIG. 3 is a schematic explanation view of an inner sleeve body, driven gear, screwed body and the like;

FIG. 4 is a schematic cross sectional view of a rear end part of an elongated body 11 a;

FIG. 5 is a schematic explanation view showing the way in which a driven gear 14 and inner sleeve body 11 are assembled integrally;

FIG. 6 is a schematic explanation view of main parts (prevention means for rotation and detection means for an extrusion operating part);

FIG. 7 is a schematic explanation view of main parts (when a clutch connects a transmission gear);

FIG. 8 is a schematic explanation view in section (extrusion operating part backs away);

FIG. 9 is a schematic explanation view in section (when an inner sleeve body rotates, an opening is communicated with an discharge hole);

FIG. 10 is a schematic explanation view in section (an extrusion operating part moves forward);

FIG. 11 is another example for a pump X of the present invention (related invention Z); and

FIG. 12 is a process showing a method of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

An understanding of the present invention may be best gained by reference FIGS. 1 to 10.

(1) Basic Constructional Element

Reference letter X is a pump for supplying fluid, and an outer sleeve body, inner sleeve body and the like of the pump X are arranged in a transverse direction on an upper surface of an upper horizontal plate 1 a of a fixed member 1 which is formed in the shape of a case, rack and the like. The fixed member 1 is installed as a part of a frame of a supply device Z for the soup with fixings, for example.

In addition, a plurality of openings or notch part including the opening for a discharge pipe, opening for a gear and opening for a transmission gear, which are not allotted the reference sign are formed accordingly at the upper horizontal plate 1 a.

Furthermore, one of the drive sources (drive motor) 21 for the pump X is arranged in a transverse direction through an attachment plate for the motor at a side of a lower surface of the upper horizontal plate 1 a.

Furthermore, an attachment frame 1 c, which is formed in the shape of a case, is provided at a rear end of the upper surface of the upper horizontal plate 1 a, and a trough hole thereof introduces a rear end of an operating rod 20 of an extrusion operating part 18 which is described later. In addition, a plurality of detection means S2 for the extrusion operating part 18 are arranged at the attachment frame 1 c at a required space. Furthermore, as shown in FIG. 6, a base 37 for protecting the rotation for the extrusion operating part 18 is installed in the attachment frame 1 c. A caught part 37 a is formed on the upper surface of the protecting base 37, engaging with a catching part 20 b provided at the operating rod 20. The catching part 20 b of the operating rod 20 is defined by a vertical engaging piece (engaging pin, for example) which intersects with the operating rod 20, and the caught part 37 a is defined by an elongated guide groove. In this embodiment, an index for the detection means S2 or magnet piece 38 is installed in a projected upper end of the catching part 20 b horizontally.

Therefore, the extrusion operating part 18 can reciprocate through the protecting means which is composed of the catching part 20 b of the operating rod 20 and caught part 37 a of the fixed member 1.

Furthermore, the fixed member 1 has the lower horizontal plate 1 b which faces to the upper horizontal plate 1 a, and a drive means 31 (solenoid) which constructs a clutch mechanism Y is arranged on the upper surface of the lower horizontal plate 1 b in a transverse direction. Hereinafter, main member of the pump X, drive source 21 for the pump and clutch mechanism Y as a basic constructional element of the present invention.

(2) Outer Sleeve Body 2 of Pump X

The outer sleeve body 2 is composed of a body part 2 a, which is formed in the shape of an elongated sleeve, having openings which are provided at the right and left ends thereof and a head 2 b which engages with the opening at one of the end of the body part 2 a.

The composition of the body part 2 a is explained here. Reference numeral 3 is defined by a suction hole which is formed at the upper surface of the end thereof, installing removably a hopper 5 therein. In addition, the hopper 5 has means 47 for agitating as shown in FIG. 11.

Reference numeral 6 is defined by a discharge hole which is formed at a lower surface of one end thereof, facing to the suction hole 3 and having a discharge pipe with seal member or an expelling nozzle 7. The outer sleeve body 2 has a predetermined length and is fixed to the upper horizontal plate 1 a removably.

In addition, the head 2 b is fixed to a tip portion of the body part 2 a or the end of the body part 2 a through a flange provided at the circumferential part of the head 2 b and a plurality of means 8 for banding.

Although the figure is not illustrated in this embodiment especially, the seal member (O-ring) with singular or plural number is provided at an engaged portion of the member 2 a, 2 b suitably. Furthermore, the suction hole 3 and discharge hole 6 are used singular number in this embodiment. The suction hole 3 and discharge hole 6 is formed in the shape of an elongated hole (semi-arc shape, for example) at the body part 2 a to a circumferential direction, for example. Of course, they are formed any kinds of shape including the elongated hole, circle, square hole and the like.

(3) Inner Sleeve Body 11 for Pump X

The inner sleeve body (inner valve) 11 is a sleeve body with predetermined quantity, rotating by driving force of one of the drive source S21, being supplied fluid 9 at predetermined amount through the suction hole 3 from the hopper 5 and discharging outside through the discharge hole 6.

Therefore, the inner sleeve body 11 exercises the function of the inner valve for the outer sleeve body 2 corresponds to the valve body. Accordingly, one of the openings 12, which links the suction hole 3 and discharge hole 6 of the outer sleeve body 2, is provided to the inserted tip part (left side in the figure) of the inner sleeve body 11.

In addition, the inner sleeve body 11 in this embodiment includes an elongated body 11 a having the opening 12, capable of linking to the suction hole 3 and discharge hole 6 optionally and a shorten end part 11 b, capable of detaching the elongated body 11 a. The shorten end part 11 b is always biased to the engaging direction by the elastic member 4 which is provided the operating rod of the extrusion operating part 18 indirectly. In fact, the inner sleeve body 11 can be removed easily with the outer sleeve body from the fixed member 1.

The engaging relation between the elongated body 11 a and shorten end part 11 b is explained here in reference to FIG. 4. FIG. 4 is a schematic cross sectional view of a rear end part of an elongated body 11 a. As is clear from FIG. 4, a caught part 13 (notch groove) with singular or plural number is formed in the joint edge of the rear end of the elongated body 11 a. Therefore, a catching part (projection) with singular or plural number, which engages removably with the caught part 13 is formed in the joint edge of the shorten end part 11 b. The elastic member 4 in this embodiment is wound around the sleeve shaft 14 a of the driven gear 14 so as to position between the first support plate 17 a which provided at upper surface of the upper horizontal plate 1 a of the fixed member and an outer wall surface of the shorten end part 11 b.

In addition, the engaging relationship between the sleeve shaft 14 a of the driven gear 14 and shorten end part 11 b in reference to FIG. 5. FIG. 5 is a schematic explanation view showing the way in which a driven gear 14 and inner sleeve body 11 are assembled integrally. The driven gear 14 has the plurality of the caught part 15 a (notch part to the axial direction) which are provided at the outer circumferential wall of the sleeve shaft 14 a. Accordingly, the shorten end part 11 b has a plurality of catching parts 16 (projections) which engage with edge portion of the shaft hole.

The driven gear 14 fits free the operating rod of the extrusion operating part 18 in the rear end of the inner sleeve body 11 and is arranged between a first support plate 17 a and a second support plate 17 b so as to engage with the drive gear. The second support plate 17 b is provided at the upper surface of the upper horizontal plate of the fixed member so as to face to the first support plate 17 a. When the drive gear 23 of the output shaft 22 rotates by driving force of the drive motor 21, the driven gear 14 and inner sleeve body 11 rotates at the same time.

Accordingly, during the opening 12 of the inner sleeve body 11 links to the upper suction hole 3, the discharge hole 6 is closed. On the other hand, the suction hole 3 is closed during the opening 12 links to the discharge hole 6 (See FIGS. 2,3 and 4).

(4) Detection means S for Inner Sleeve Body 11

The detection means S1 for the inner sleeve body 11 is arranged above the upper horizontal plate 1 a of the fixed member 1 through the second support plate 17 b. The detection means S1 detects the rotation position of the inner sleeve body 11. The detection means S1 using a principal of a hall element, a combination of light emitting element and light-sensitive element or the like is applied selectively.

In this embodiment, the magnets are fixed at the outer circumferential wall of the driven gear 14, and the hall element is used as the detection means S1 of the fixed member 1.

Therefore, the inner sleeve body 11 rotates at 180 degrees by driving force of the drive source 21, and when one of the magnets faces to the detection means S1, the detection means S1 detects the magnetic flux of the magnet 16 and outputs the rotation position of the inner sleeve body 11 to a control part which is not shown in the figure. In addition, an index may be used as a substitute for the magnet. The detection means S2 has the composition.

(5) Extrusion Operating Part 18

The extrusion operating part 18 has a slide part 19 which is provided at a tip portion which is installed in the inner sleeve body 11. When the slide part 19, as shown in FIG. 8, backs away to a predetermined position (maximum amount of discharging, for example), it forms a chamber a with the predetermined content. On the other hand, when it moves forward to a predetermined position as shown in FIG. 10, it has a function to discharge fluid 9 which is stored in the chamber a.

In addition, the extrusion operating part 18 has an operating rod 20 (corresponding in a piston rod), which is formed in the shape of an elongated rod, being passed the inner sleeve body 11, driven gear 14, support plate 17 a, 17 b and the like therethrough.

And now, the extrusion operating part 18 in this embodiment is provided so as to reciprocate to an axle direction of the drive motor 21 by driving force of the drive motor 21 through the clutch 34 of the clutch mechanism Y provided at the fixed member 1. So the drive source 21 for the pump X is explained.

(6) Drive Source 21

The drive motor 21 as the drive source is installed in a transverse direction in the lower surface of the upper horizontal plate 1 a through a pair of bearing plates 24, 25. The left bearing plate 24 supports the base portion of the output shaft 22 and plays the attachment plate of the motor a role. On the other hand, the right bearing plate 25 supports a projected edge part of the output shaft 22. Therefore, the output shaft 22 of the drive motor 21 is supported suitably.

As stated above, the drive gear 23, which engages with the driven gear 14, is fixed to the output shaft 22 of the drive motor 21. Therefore, the drive gear 23 moves with the output shaft 22 in concert.

In addition, the transmission gear 26 (second drive gear) is fixed to the output shaft 22, facing to the drive gear 23 at a predetermined space L. Therefore, the transmission gear 26 moves the output shaft 22 in concert.

Furthermore, the transmission gear 26 is engaged with the screwed body 27 (second driven gear) which screws into a screwed part 20 a formed at the projected rear edge of the operating rod 20. Therefore, when the screwed body 27 rotates in clockwise or anticlockwise direction by driving force of the drive motor 21, the extrusion operating part 18 reciprocates into the inner sleeve body 11 through the rotating prevention means.

The pair of the first support plate 17 a and second support plate 17 b, which are fixed on the upper surface of the upper horizontal plate 1 a at a predetermined space, supports the screwed body 27 so as to sandwich. Therefore, the screwed body 27 rotates at a predetermined position in stable condition.

(7) Detection Means S2 for Extrusion Operating Part

The plurality (three pieces, four pieces, for example) of detection means S2 for the extrusion operating part 18 are installed in the attachment frame 1 c (this embodiment) which is formed n the shape of a case or an attachment for detection means in order to detect the starting position and moved position of the extrusion operating part. The detection means S2 is used in a limit switch as one example. In addition, the index or magnet 38 for detection means S2 is provided through the catching part 20 b (this embodiment) of the operating rod.

(8) Clutch Mechanism Y

And now, the plurality of the caught parts 23 a, 26 a (small hole, small groove and the like) is formed at the opposite surface to the drive gear 23 and transmission gear 26. The caught parts 23 a, 26 a are fitted detachably the clutch 34 as the clutch mechanism Y.

In reference to FIGS. 2 and 7, the composition member of one of clutch mechanism Y is explained. Reference numeral 31 is a drive means (solenoid, for example) for clutch which is provided at an upper surface of the lower horizontal plate 1 b in a transverse direction. Reference numeral 32 is an operating rod of the solenoid 31; and reference numeral 33 is an upward engage arm which is fixed to the tip portion of the operating rod 32 at a cross state.

Reference numeral 34 is a clutch which is provided to the output shaft 22 of the drive motor 21 in an axle direction slidably, connecting to the drive gear 23 or transmission gear 26 selectively. The clutch 34 in this embodiment is defined by a block body which is looks like a “H” shaped appearance, and one of the vertical plates 35 has a plurality of engaging pin 35 a which fits detachably the caught part 23 a of the drive gear 23.

In addition, a plurality of the engaging pins 36 a are provided at another vertical plate 36, fitting removably to the caught part 26 a of the transmission gear 26. An upper end portion of the engaging arm 33 is positioned between the vertical plate 35 and 36.

Therefore, as shown in FIG. 2, when the operating rod 32 of the solenoid 31 extends, the clutch 34 slides in a direction close in the drive motor 21, and the left vertical plate 35 connects the drive gear 23.

On the other hand, as shown in FIG. 7, when the operating rod 32 of the solenoid 31 shrinks, the clutch 34 slides in a direction away from the drive motor 21, and the right vertical plate 36 connects the transmission gear 26. Therefore, the inner sleeve body 11 can be rotated through the clutch mechanism Y by driving force one of the drive motor 21, and it makes the extrusion operating part 18, which is assembled in the inner sleeve body 11 to reciprocate.

(9) Operation

When the operation means (starting switch), which is not shown in the figure, is operated, the operating rod 32 of the solenoid 31 is shortened. When the operating rod 32 moves to right direction as shown in FIG. 7, the clutch 34 also slides to the same direction and connects to the transmission gear 26.

Then, when the drive motor 21 drives (normal rotation), the extrusion operating part 18 backs away to the predetermined position (setting value of discharging amount including 200 cc, 300 cc and the like) through the screwed body 27 which engages with the transmission gear 26, and then, one of the detection means S2 for the extrusion operating part 18 detects the retreat position of the extrusion operating part.

When the extrusion operating part 18 backs away, the extrusion operating part 18 stops at the predetermined position so that fluid is just sucked in the inner sleeve body at the fixed quantity.

As shown in FIG. 2, when the operating rod 32 of the solenoid 31 extends, the clutch 34 allows the output shaft 22 to slide in the same direction and connects to the drive gear 23. Then, the engaging pin 35 a of the vertical plate 35 of the clutch 34 engages with the caught part 23 a of the drive gear 23.

Then, when the drive motor 21 starts, the inner sleeve body 11 rotates at a predetermined angle (180 degrees, for example) through the driven gear 14 which engages with the drive gear 23. The rotating position of the inner sleeve body 11 is detected by the detection means S1. When the inner sleeve body 11 rotates at predetermined degrees, one of the openings 12 moves downwardly and links the discharge hole 6 of the outer sleeve body 2 (See FIG. 9).

Therefore, fluid 9 of the inner sleeve body drops from the discharge pipe 7, that is, it is tipped out in a glass. Then, as shown in FIG. 7, the operating rod 32 of the solenoid shrinks (return), and the drive motor 22 can rotate in the opposite direction. Therefore, the extrusion operating part 18 moves forward into position by drive transmission force of the transmission gear 26. Accordingly, all fixings mixed in fluid 9 in the inner sleeve body 11 are pushed out by the slide part 19 of the extrusion operating part 18 (See FIG. 10).

After that, the operating rod 32 of the solenoid 31 extends. Then, driving force in the drive motor 21 transmits the drive gear 23 so that the inner sleeve body 11 rotates at a specified quantity again.

As mentioned above, the inner sleeve body 11 (inner valve) rotates by driving force of the drive source 21, taking fluid 9 therein through the suction hole 3 from the hopper 5 and discharging outside through the discharge hole 6. On the other hand, the extrusion operating part 18 reciprocates to the axle direction by driving force of the drive source 21 through the clutch mechanism Y.

(10) Method for Supplying Fluid

In reference to FIG. 12, the method for supplying fluid is explained. Accordingly, through this embodiment, like components is denoted by like numerals as of the product in the above-mentioned embodiment and will not be further explained in great detail.

Reference letter A is a method for making the extrusion operating part 18 to going back, the extrusion operating part 18 installing rotatably into the outer sleeve body, and installing a slide part 19 into the inner sleeve body 11 with the function of the inner valve. In this process A, the extrusion operating part 18 is made to go back through the clutch 34 of the clutch mechanism Y arranged at the bottom part of the fixed member 1 and by driving force of one of the drive motor 21.

The clutch 34 engages with the transmission gear 26 fixed to the output shaft 22 by sliding the output shaft 22 of the drive motor 21 in the axis direction and by the acting of the operating rod 20 of the solenoid 31 provided to the fixed member 1. The transmission gear 26 screws the screwed part 20 a of the operating rod 20 of the extrusion operating part 18 which is arranged at the upper portion of the fixed member 1 and engages with the screwed body 27 which rotates at predetermined position. Therefore, when the drive motor 21 rotates in the regular direction, it backs away up to the predetermined position of the maximum amount of discharging. Then, the certain amount of fluid 9 introduces to the chamber a with certain content of the inner sleeve body 11 from the hopper 5 as the supply source through the opening 12 of the inner sleeve body 11.

Reference letter B is a process for rotating the inner sleeve body 11 at a predetermined degrees against the outer sleeve body having the suction hole 3 provided at the upper part thereof and discharge hole 6 provided at the lower part thereof. In this process B, the inner sleeve body 11 is rotated at the predetermined degrees through the clutch 34 of the clutch mechanism Y and by driving force of the drive motor 21, and fluid 9 into the chamber a of the inner sleeve body 11 drops.

In other words, for this process B, when the constant amount of fluid 9 is supplied into the inner sleeve body 11, the inner sleeve body 11 is rotated at the predetermined degrees through the clutch 34 of the clutch mechanism Y and by driving force of the drive motor 21 inner sleeve body 11, and the opening 12 is communicated with the discharge hole 7 of the outer sleeve body. Then, the clutch 34 fits the drive gear 23 fixed to the output shaft 22 by working of the operating rod 20 of the solenoid 31 and sliding the output shaft 22 of the drive motor 21 in the axis direction. Because the drive gear 23 engages with the driven gear 14 fixed to the rear end of the inner sleeve body 11, the inner sleeve body 11 rotates at 180 degrees by driving force of the drive motor 21. Furthermore, when the opening 12 of the inner sleeve body 11 is communicated with the discharge hole 6 of the outer sleeve body 2, fluid 9 in the chamber a drops. Therefore, fluid 9 is tipped out in a glass.

Reference letter C is a process for going the extrusion operating part forward at the predetermined position. It is necessary to push out the soup with fixings as an example completely in this process C.

The extrusion operating part 18 is allowed to go forward through the clutch 34 of the clutch mechanism Y by driving force of the drive motor 21. Then, the clutch 34 fits the transmission gear 26 by working of the operating rod 20 of the solenoid 31 and sliding the output shaft 22 of the drive motor 21 in the axis direction.

Therefore, the driving force of the drive motor 21 is transmitted the screwed body 27 through the transmission gear 26 so that the extrusion operating part 18 moves forward. As a result, the remained objects c (fixings, for example) including meet, carrots, burdock and tofu in the chamber a fall from the discharge hole 6 in a glass b.

Reference letter D is a process for standby that it makes the inner sleeve body 11 to rotate to the original position. In this process D, the inner sleeve body 11 is rotated at the predetermined degrees through the clutch 34 of the clutch mechanism Y and by driving force of the drive motor 21 as the same of the process B, and the opening 12 is communicated with the discharge hole of the outer sleeve body. As a result, when the operation means (manual operation button, for example), which is not shown in the figure, is operated, it shifts to the above-mentioned process A.

In addition, for the process A and B, after agitation means 47, 48 is started up, fluid 9 in the hopper 5 is agitated preferably.

(11) Applicable Example Related Invention

FIG. 11 is another example for a pump X of the present invention (related invention Z). One example of the related invention is a supply device for the soup with fixings. The supply device Z includes an operation panel having a plurality of operation means 40 which is provided at an appropriate position (tip portion of the upper horizontal plate 1 a, for example) of the fixed member 1. In addition, a control box 41 is provided at the upper-right of the fixed member 1. A control board 42, a power board 43 and the like are installed into the control box 41.

The hopper 5 supplied fluid 9 therein is arranged fixedly through a heating box 45 having means 46 for heating, heating means 46 providing in front (right side in the figure) of the control box 41. The hopper 5 may include means 47 for agitating suitably. In addition, a motor box 49 installed a drive motor 48 for agitating means 47 is provided at a upper portion of the hopper 5 practicably. The details of the related invention Z is not restricted so that it is spared someone the details.

EXAMPLE

For the example in the embodiment of the present invention, in the extrusion operating part 18, the caught part 20 b may be formed at the operating rod 20, forming in the shape of a concave, and the catching part 37 a may be provided at the fixed member 1, forming in the shape of a projection.

In addition, the soup with fixings as fluid 9 is explained in the present invention, and fluid 9 includes any kind of liquid or the like.

Fluid 9 including fabricated food, coating compositions and various materials is supplied in the hopper 5. For example, the fabricated food includes soymilk, tomato ketchup, mayonnaise, soup, ice cream and the like. The coating compositions include paint. The material includes makeup cream, toothpaste and the like.

INDUSTRIAL APPLICABILITY

The pump in the present invention is manufactured in business field for the pump. For example, it is used in the food-service business, that is, the soup is repackaged into smaller sizes and provided for customers.

As set forth above, the advantages of the invention are as follows:

-   (1) For the invention described in claims 1, 2 and 7, driving force     of one of the drive motor is used for reciprocating the extrusion     operating part and rotating the inner sleeve body so that the number     of the drive motor is decreased and as a consequence, it can reduce     the manufacturing cost. -   (2) For the invention described in claims 2 and 8, the extrusion     operating part reciprocates stably and smoothly. -   (3) For the invention described in claim 3, the assembly of each     member is reasonable, and the clutch engages with both gears     certainly. -   (4) For the invention described in claim 4, the extrusion operating     part works stably. -   (5) For the invention described in claim 5, since the shorten end     part sets apart easily, it is easy to break the inner sleeve body,     extrusion operating part and the like. Therefore, it is easy to     clean each part. -   (6) For the invention described in claim 6, it can detect the moved     position of the extrusion operating part and rotating position of     the inner sleeve body. In particular, when the plurality of the     detection means S2 for the extrusion operating part are arranged, it     can select the stroke (reciprocating distance) of the extrusion     operating part. 

1. A pump for supplying fluid comprising: an outer sleeve body having a suction hole and discharge hole; an extrusion operating part which is installed rotatably into said outer sleeve body, installing a slide part into an inner sleeve body with a function of an inner valve; a drive motor which makes to said inner sleeve body and said extrusion operating part; a fixed member which is provided said drive motor, a drive gear and transmission gear which move an output shaft of said drive motor in concert and a clutch mechanism having a clutch which engages with said gears; a driven gear which is provided at an end portion of said inner sleeve body, engaging with an operating rod of said extrusion operating part freely and engaging with said drive gear; and a screwed body, which is formed in the shape of a sleeve, positioning between support plates of said fixed member, screwing a screwed part of said operating rod and engaging with said transmission gear.
 2. The pump for supplying fluid according to claim 1, wherein said extrusion operating part reciprocates through means for preventing rotation, said prevention means including a catching part which is provided at said operating rod and a caught part which is provided at said fixed member.
 3. The pump for supplying fluid according to claim 1, wherein said drive gear and said transmission gear are fixed to said output shaft of said drive motor, and said clutch is provided slidably at said output shaft to connect to said drive gear and transmission gear selectively.
 4. The pump for supplying fluid according to claim 1, wherein said operating rod of said extrusion operating part passes through a center part of said driven gear and said screwed body and is supported by said support plate of said fixed member.
 5. The pump for supplying fluid according to claim 1, wherein inner sleeve body further includes an elongated body having an opening, capably of communicating with said suction hole and discharge hole selectively and a shorten end part capable of engaging with said elongated body, and said shorten end part is biased always in a fitting direction by an elastic member which is provided indirectly to said operating rod of said extrusion operating part.
 6. The pump for supplying fluid according to claim 1, wherein said fixed member has a plurality of means for detecting moving position of said extrusion operating part.
 7. A method for supplying fluid by a pump for supplying fluid, said pump including an outer sleeve body having a suction hole and discharge hole, an extrusion operating part which is installed rotatably into said outer sleeve body, installing a slide part into an inner sleeve body with a function of an inner valve and a drive motor which makes to said inner sleeve body and said extrusion operating part, said method comprising: going back said extrusion operating part through a clutch of a clutch mechanism and by driving force of one of said drive motor; rotating said inner sleeve body at a predetermined degree through said clutch of said clutch mechanism and by driving force of said drive motor and falling said fluid which is stored into a constant-volume chamber of said inner sleeve body; going said extrusion operating part forward through said clutch of said clutch mechanism and by driving force of said drive motor; and standing ready said inner sleeve body to rotate at a predetermined degree through said clutch of said clutch mechanism and by driving force of said drive motor and rotate to an original position
 8. The method for supplying fluid by a pump for supplying fluid according to claim 7, wherein said extrusion operating part reciprocates through means for preventing rotation, said prevention means including a catching part which is provided at said operating rod and a caught part which is provided at said fixed member. 